Average wrist circumference, by age

Age	Girls	Boys
Age	mm	mm
8	140.00	130.00
9	143.04	142.86
10	144.68	148.85
11	145.04	151.38
12	150.77	157.23
13	151.52	160.42
14	151.37	163.96
15	156.59	166.56
16	153.58	172.17
17	151.22	171.93
18	151.52	165.95
19	144.07	170.71

Source: Census at School Canada, 2013-2014